What’s Vulnerable › Vulnerabilities

CVE-2026-109229: SGLang through 0.5.21 Decompression Bomb DoS via NanoNemotronVLImageProcessor

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-12 · updated 2026-10-13
• Weakness: CWE-409

Description

SGLang through 0.5.21 contains a denial of service vulnerability that disables Pillow decompression bomb protection process-wide by setting Image.MAX_IMAGE_PIXELS to None in NanoNemotronVLImageProcessor. Remote attackers can submit small, highly compressed images with huge dimensions to the generic image loader, exhausting worker memory during decoding.

Affected products

• SGLang: through 0.5.21

References

• https://github.com/sgl-project/sglang
• https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/multimodal/processors/nano_nemotron_vl.py#L82
• https://github.com/sgl-project/sglang/blob/v0.5.21/python/sglang/srt/utils/common.py#L1952-L1961
• https://github.com/sgl-project/sglang/issues/43707
• https://www.vulncheck.com/advisories/sglang-through-0.5.21-decompression-bomb-dos-via-nanonemotronvlimageprocessor
• https://github.com/sgl-project/sglang/issues/43707

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